. >> and this is the most energy efficient government building in the united states today, if not the world. and it is an example that the entire united states can look to and say, that's what we need to do to save our city hundreds of millions of dollars in energy consumption a year and set an example to everybody of how to save energy, to be green, to be sustainable, to be responsible. the city is leading the way. >> it will be immediately recognizable and iconic from various parts of the city or even if you see a picture. that's the sfpuc building. it's a wonderful building. ♪ ♪ >> it goes back to the 18 50s fisherman's wharf, meg's wharf which was the place in san francisco to enjoy yourself. eventually fisherman's wharf moved into youctionv to where the explore or yum is and it moved back up here. but in the 1950s, the port was coming out of world war ii, was trying to understand what container station was going to look like, and they commissioned a study that looked at the economic impact of the port to the city. * that sounds familiar, does continue, mr. mayor? and particul